- Dr. Elijah Cooper: If any country anywhere explodes a thermal nuclear bomb in the atmosphere, either for testing, or for warfare, it will trigger an irreversible chain of events here, and in six hours, the doomsday device will detonate. And life on Earth will be ended.
- Dr. Rudy Wells: So you intend to blackmail the world into peace?
- Dr. Elijah Cooper: I hope so, Dr. Wells.
- Dr. Elijah Cooper: [on TV screen] It is awesome, isn't it? Supreme devastation. But let me tell you this, my friends: It is only a very small scale compared to what will happen the next time, such a nuclear detonation occurs. Because I have now created a device that can render the entire world lifeless.
- ALEX 7000: The central core housing the Doomsday device is more than a mile underground and I have sufficient defences to stop you. I am programmed to show no mercy. You will die if you make the attempt.
- Jaime Sommers: So, then it is a duel between you and me.
- ALEX 7000: Yes. May the best... one win.